Measuring device.



F. J. WOLFF.

MEASURING DEVICE} APPLICATION FILED NOV- 9. 1914.

m W I M m a FRANKLYN J. WOLFE, OF CHICAGO, ILLINOIS.

MEASURING DEVICE.

Specification of Letters Patent.

Patented Apr. 11, 1916.

Application filed November 9, 1914. Serial no. 870,981.

To all whom it may concern Be it known that I, FRANKLYN J .IVOLFF, acitizen of the United States, residing in Chicago, in the county of Cookand State of Illinois, have invented a new and useful Improvement inMeasuring Devices, of which the following is a specification.

My invention relates in general to measuring devices and moreparticularly to cali pers designed for use in measuring inside andoutside dimensions between or behind obstructions, which obstructionsprevent the material and the like behind and between flanges and otherobstructions and also perm'itting the taking of accurate measurements ofinternal passageways of non-continuous form.

A further object of the invention is the provision of such a devicewhich may be readily collapsed and carried in the pocket of the owner oruser. Still another object of the invention is the provision of such adevice consisting of a few and simple parts strongly and cheaplyconstructed and easily operable.

Other objects and advantages of the in vention will be apparent as it isbetter understood from the following description when considered inconnection with the accompanying drawing illustrating a preferredembodiment thereof.

On the drawing Figure 1 is a side elevation of a measuring deviceembodying my invention; Fig. 2 is a similar View showing the partsarranged in different relation; and Fig. 3 is a View taken at rightangles to Fig. 1 from the right, only the upper portion of the devicebeing shown.

The embodiment of my invention shown on the drawing consists primarilyof two S-shaped arms 4 and 5, to one of which is pivotally connected ascale 6. The S-shaped arms 4 and 5 are oppositely arranged and arepivoted intermediate their ends at 7. The scale 6 is secured upon apivot arm 8 with its zero points arranged at and opposite the pivotalaxis of the pivot arm 8.

The graduations on this scale are such that dimensions defined at thepoints 9 and 10 of the S-shaped members 8, that is to say, the pointslocated at adjacent ends of the arms 5 and 7, may read on the scale atthe point 11 of the free ends of the S-shaped arms at the other side ofthe pivotal connections 7. In the present instance, the pivotalconnection is located centrally of each arm 4 and 5, although it may beotherwise located with a corresponding change in thescale graduations 12on the scale. The ends 14, 1-5 and 16 of the arms which are the endsprovided with the points 9, 10 and 11 are rounded so that the arms onlycome 1n contact wlth the article being measured and the arm crosses thescale graduations.

The end 17 on the arm 5 on which the scale ispivotally securedto thepivot arm 8 is depressed near its end at 18 so that the scale which issecured upon the outer face of the pivot arm 8 may be disposedsubstantially in the plane of the arm 5, thereby bringing a smooth evencontact between the rear face of the end 16 and the scale when the partsare arranged for service.

When the outside dimensions are desired the parts are arranged as shownin Fig. 1, the scale extending toward the right and beneath-theadjacent-end 16 of the arm 4. When, however, it is desired to change thearrangement to take an inside dimension,

the scale is swung upwardly to the left through substantially 180 intothe position shown in Fig. 2 and the two arms 4 and 5 are moved pasteach other until the end 16 as shown. Other graduations 19 may bearranged along the other edge for straight linear measurements ifdesired. All the graduations may be arranged in various other wayswithout departing from the spirit and scope of my invention. The

measuring device may be arranged between its periods of use to-becarried in the pocket of the owneror user. This is done by moving thescale upwardly until it clears the end 16 of the arm 4, then moving itdownwardly on top of this arm into the position shown in dotted lines at20 in Fig. The

arm 4r may then be brought to the position shown in dotted lines at 21in this figure,

' thereby arranging the parts in collapsed merely a preferredembodimentthereof.

' I claim 1. A measuring device comprlsmg a pair of arms pivotedtogether at their centers,

said arms having curved ends on one side of their pivotal connection,adapted when in one relation to determine inside dimensions and whenswung past each other into a second relation to determine outsidedimensions, a scale pivoted at one end to the other end of one of saidarms and adapted to underlie the adjacent end of the other arm in allpositions of the first named arms.

2. A measuring device comprising a pair of arms pivoted togetherintermediate their ends, said arms having curved ends on one side oftheir pivotal connection, adapted when in one relation to determineinside di' mensions and when swung past each other into a secondrelation to determine outside dimensions, a scale pivoted at one end tothe other end of one of said armsand adapted to underlie the adjacentend of the other arm in all positions of the first named-arms. 3. Ameasuring device comprising a pair of arms pivoted together. at theircenters and adapted when in one position to measure outside dimensionsand when in another position to measure inside dimensions be-' tweenthesame adjacent ends of said arms, and a swinging scale pivoted to theopposite end of one of said arms with its zero point located at itspivotal axis and adapted to underlie the adjacent end of the other armin all positions of said arms.

Signed in the presence of two subscribing witnesses.

FRANKLYN J, WOLFE.

Witnesses:

JOHN H. GAVIN, GEORGE SHWARTZ.

